Roddy, A. F. , The physics of noctilucent cloud
formation, in Collection of Works of the International Workshop of Noctilucent
CLouds, ed. O. A. Avaste, pp. 33-57, Academy
of Sciences of
the Estonian SSR, Talinn ,1986.

Roble, R. G., and R. E. Dickinson, How will changes
in carbon dioxide and methane modify the mean structure of the mesosphere
and thermosphere?, Geophys. Res. Lett., 16, 1441-1444, 1989.